CN110686867B - Optical return loss calibration transfer device and method - Google Patents
Optical return loss calibration transfer device and method Download PDFInfo
- Publication number
- CN110686867B CN110686867B CN201911045195.0A CN201911045195A CN110686867B CN 110686867 B CN110686867 B CN 110686867B CN 201911045195 A CN201911045195 A CN 201911045195A CN 110686867 B CN110686867 B CN 110686867B
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- optical
- cavity
- return loss
- fiber connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention provides a light return loss calibration transmission device and a method, which comprises a cavity, wherein an optical fiber jumper wire is arranged in the cavity, optical fiber connectors are arranged at two ends of the optical fiber jumper wire, an antireflection film or a reflecting film is arranged on the end face of a first optical fiber connector, and the end face of the first optical fiber connector is arranged in a light absorption cavity; the second optical fiber connector is arranged outside the cavity body. The calibration requirements of measuring equipment such as an optical return loss measuring instrument and an optical frequency domain reflectometer on high-magnitude return loss parameters can be met.
Description
Technical Field
The disclosure belongs to the technical field of optical return loss calibration transfer, and relates to an optical return loss calibration transfer device and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the rapid development of optical fiber communication, a large number of optical fiber devices, such as optical fiber jumpers, optical switches, wavelength division multiplexers, optical isolators, etc., are used in an optical fiber communication system, and the insertion loss and the return loss of the optical fiber devices have a large or even fatal influence on the optical fiber communication system, so that the insertion loss and the return loss test of the optical devices are essential. At present, instruments for testing optical return loss are mainly an optical return loss measuring instrument, an optical time domain reflectometer, an optical frequency domain reflectometer and the like, and whether the measuring instruments are accurate or not has great influence on an optical fiber communication system. At present, aiming at the calibration of the instruments, calibration capability within a (0-60) dB range is established by a plurality of metering mechanisms, but the calibration cannot be carried out aiming at the instruments above 60dB at present, so that the research of the optical return loss transmission device with high magnitude and high stability has important significance for ensuring the accuracy and reliability of the magnitudes of the optical return loss measuring instrument and the optical frequency domain reflectometer.
The optical return loss parameter is easily influenced by the external environment, especially the return loss calibration test under high value. Therefore, in order to develop a high-magnitude optical return loss transmission device, it is necessary to perform an antireflection coating process on the end face of the optical fiber, perform a vibration isolation and sound insulation process on the transmission device, and perform a light isolation process on the end face of the optical fiber. The processed high-magnitude and high-stability optical return loss transmission can reach an optical return value above 70dB, the stability can reach less than 0.5dB (within 2 hours), and the calibration requirements of measuring equipment such as an optical return loss measuring instrument and an optical frequency domain reflectometer on high-magnitude return loss parameters can be met.
According to the knowledge of the inventor, there are some documents to improve the calibration and transmission device for optical return loss, which is composed of an optical fiber tapered coupling attenuator, an optical fiber splice and an optical fiber coupler, and the device is formed by connecting more than one optical fiber tapered coupling attenuators in series, and obtains the transmission device with different return loss values by selecting attenuators with different attenuation values, however, the above technical solution has the following disadvantages:
the return loss value can only reach 60dB at most, and cannot meet the measurement calibration requirements of equipment such as an optical frequency domain reflectometer, and meanwhile, the return loss value can drift under the condition of multiple use, so that the long-term calibration of a return loss testing instrument is inconvenient. The optical return loss tester can only carry out verification and calibration on optical return loss parameters of specific equipment such as the optical time domain reflectometer, can only achieve low-magnitude optical return loss values, and cannot carry out verification and calibration on the optical return loss tester and the optical frequency domain reflectometer.
Disclosure of Invention
In order to solve the above problems, the present disclosure provides an optical return loss calibration transfer device and method, and the optical return loss value of the processed high-magnitude and high-stability can reach an optical return value above 70dB, and the stability can reach <0.5dB (within 2 hours), so that the calibration requirements of the measurement devices, such as an optical return loss measurement instrument and an optical frequency domain reflectometer, on the high-magnitude return loss parameters can be met.
According to some embodiments, the following technical scheme is adopted in the disclosure:
an optical return loss calibration transfer device comprises a cavity, wherein an optical fiber jumper wire is arranged in the cavity, optical fiber connectors are arranged at two ends of the optical fiber jumper wire, an antireflection film or a reflecting film is arranged on the end face of a first optical fiber connector, and the end face of the first optical fiber connector is arranged in a light absorption cavity;
the second optical fiber connector is arranged outside the cavity body.
By way of further limitation, the fiber optic splice is an FC/APC splice.
As a further limitation, the light-absorbing cavity is subjected to a blackening treatment.
By way of further limitation, the end face of the light-absorbing cavity is a non-regular plane.
Therefore, light output by the optical fiber connector cannot directly hit the surface of the absorption cavity and be reflected back into the connector, and the absorption cavity subjected to blackening can absorb scattered optical signals.
As a further limitation, the optical fiber patch cord is a single mode optical fiber patch cord and is wound around a winding rod.
As a further limitation, the cavity is used for accommodating the light absorption cavity and the optical fiber jumper, has certain flexibility, and can fix the wound optical fiber jumper. Plays a certain role in shock absorption and vibration resistance.
As a further limitation, the optical fiber connector further comprises a black box body for accommodating the cavity, the light absorption cavity, the first optical fiber connector and the optical fiber jumper, and accommodating at least a part of the second optical fiber connector.
By way of further limitation, an antireflection film or a reflection film is arranged on the end face of the second optical fiber connector.
As a further limitation, the end face of the optical fiber connector has an inclined angle, and the inclined plane is provided with an antireflection film or a reflection film, so that return loss transmission values with different magnitudes are established by adjusting film systems with different transmittances or reflectivities.
The preparation method of the device comprises the steps of winding the single-mode optical fiber jumper wire around the winding rod for a plurality of circles, plating an antireflection film or a reflection film on the end face of the single-mode optical fiber connector, placing the end face of the optical fiber connector into a light absorption cavity with blackening treatment on a cavity surface, so as to prevent external stray light from being reflected back through the end face of the optical fiber connector and influencing an optical return loss value, and placing at least one part of the cavity, the light absorption cavity, the first optical fiber connector, the optical fiber jumper wire and the second optical fiber connector in a black box body to realize verification and calibration of the optical frequency domain reflectometer.
Compared with the prior art, the beneficial effect of this disclosure is:
(1) selecting a high-quality ground FC/APC joint, then plating an antireflection film on the end face of the optical fiber, calculating parameters such as the transmittance of the antireflection film, a working waveband and the like according to the manufactured return loss value, and simultaneously performing winding processing on the tail end with the FC/APC joint;
(2) the FC/APC connector is covered by the light absorption cavity subjected to blackening treatment, so that external stray light can be prevented from entering the optical fiber connector, and the value of optical return loss is further increased;
(3) in order to ensure the stability of the state, the joints and the jumper wires are processed, the devices are wrapped by vibration isolation cotton, and then the whole device is packaged by a shell, so that the optical return loss parameters of the optical frequency domain reflectometer and the optical return loss measuring instrument can be accurately calibrated, and the problem that the high-value optical return loss parameters cannot be solved at home at present is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic structural diagram of the present disclosure.
Wherein: 1. a light absorbing cavity; 2. an anti-reflection film; 3. FC/APC linkers; 4. an optical fiber jumper; 5. FC/APC linkers; 6. black box, 7, light return loss holding cavity.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The optical return loss calibration and transmission device mainly comprises an optical fiber end face after film coating, a light absorption cavity after blackening treatment, an optical fiber jumper, an optical return loss holding cavity, a black box body and the like.
The optical fiber end face is processed by plating an antireflection film based on an inclined FC/APC joint, and return loss transmission quantities with different quantities are developed by adjusting film systems with different transmissivity or reflectivity.
In the present embodiment, the angle of inclination may be selected to be 8 °. Of course, in other embodiments, other parameters may be substituted.
The light absorption cavity is a blackened cavity (which can be an aluminum box) and is designed into an irregular plane, so that light output by the optical fiber connector cannot directly hit the surface of the absorption cavity and be reflected back into the connector, and meanwhile, the blackened absorption cavity can absorb scattered light signals.
The optical fiber jumper wire is manufactured by selecting a high-quality optical fiber jumper wire and winding the optical fiber jumper wire.
The optical return loss maintaining cavity is used for fixing the wound optical fiber jumper and performing shock absorption and vibration resistance on the optical fiber jumper. May be formed of vibration isolating cotton.
The black box body is used for attractively processing the processed optical return loss transmission device, so that the processed optical return loss transmission device meets the calibration requirement of the optical frequency domain reflectometer.
As shown in fig. 1, the single mode optical fiber jumper is first wound around the winding rod several times and fixed in the optical return loss holding cavity, which can reduce the power value of reflected light. And then selecting an optical fiber connector with the type of FC/APC, and plating an antireflection film or a reflecting film on the end face of the single-mode optical fiber connector, wherein the reflectivity index of the film system needs to be obtained by the quantity value back-stepping of the optical return loss. And finally, placing the end face of the optical fiber connector into a light absorption cavity with the blackening treatment of the cavity surface so as to prevent external stray light from being reflected back through the end face of the optical fiber connector and influencing an optical return loss value, and finally placing at least one part of the cavity, the light absorption cavity, the first optical fiber connector, the optical fiber jumper and the second optical fiber connector in a black box body to realize the verification and calibration of the optical frequency domain reflectometer.
The diameter of the winding rod is in this embodiment one centimeter. In other embodiments, other parameters may be substituted.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (5)
1. An optical return loss calibration transfer device, characterized by: the optical fiber patch cord is arranged in the cavity, optical fiber connectors are arranged at two ends of the optical fiber patch cord and are FC/APC connectors, an antireflection film or a reflecting film is arranged on the end face of a first optical fiber connector, and the end face of the first optical fiber connector is arranged in the light absorption cavity; the light absorption cavity is subjected to blackening treatment, and the end face of the light absorption cavity is an irregular plane;
the cavity is formed by vibration isolation cotton, is used for accommodating the light absorption cavity and the optical fiber jumper, has certain flexibility, can fix the wound optical fiber jumper, and plays a certain role in shock absorption and vibration resistance;
the end face of the second optical fiber connector is provided with an antireflection film or a reflecting film, and the second optical fiber connector is arranged outside the cavity body.
2. An optical return loss calibration transfer device as defined in claim 1, wherein: the optical fiber jumper is a single-mode optical fiber jumper and is wound on a winding rod.
3. An optical return loss calibration transfer device as claimed in any one of claims 1-2, wherein: the optical frequency domain reflectometer comprises a cavity, an optical absorption cavity, a first optical fiber connector, an optical fiber jumper and at least one part of a second optical fiber connector, and further comprises a black box body, wherein the black box body is used for accommodating the cavity, the optical absorption cavity, the first optical fiber connector and the optical fiber jumper, and at least one part of the second optical fiber connector is also accommodated so as to realize verification and calibration of the optical frequency domain reflectometer.
4. An optical return loss calibration transfer device as defined in claim 1, wherein: the end face of the optical fiber connector is provided with an inclined angle, an antireflection film or a reflecting film is arranged on the inclined plane formed by the inclined angle, and return loss transmission values with different values are constructed by adjusting film systems with different transmittances or reflectivities.
5. A method of manufacturing a device according to any of claims 1-4, characterized by: the single-mode optical fiber jumper is wound around the winding rod for a plurality of circles, the end face of the single-mode optical fiber connector is plated with an antireflection film or a reflection film, and the end face of the single-mode optical fiber connector is placed into a light absorption cavity with the blackening treatment on the cavity surface, so that the influence on the optical return loss value caused by the reflection of external stray light back through the end face of the optical fiber connector is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911045195.0A CN110686867B (en) | 2019-10-30 | 2019-10-30 | Optical return loss calibration transfer device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911045195.0A CN110686867B (en) | 2019-10-30 | 2019-10-30 | Optical return loss calibration transfer device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110686867A CN110686867A (en) | 2020-01-14 |
| CN110686867B true CN110686867B (en) | 2022-05-03 |
Family
ID=69114883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911045195.0A Active CN110686867B (en) | 2019-10-30 | 2019-10-30 | Optical return loss calibration transfer device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110686867B (en) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3704031B2 (en) * | 2000-07-27 | 2005-10-05 | 日本電信電話株式会社 | Waveguide characteristic evaluation equipment |
| CA2424820C (en) * | 2003-04-08 | 2010-06-22 | Institut National D'optique | Prismatic reflection optical waveguide device |
| JP4103999B2 (en) * | 2003-04-18 | 2008-06-18 | 日本電信電話株式会社 | Optical line loss measuring method and measuring apparatus |
| CN100520335C (en) * | 2005-01-28 | 2009-07-29 | 亚洲光学股份有限公司 | System structure of back reflection power meter and operating method thereof |
| US7151872B1 (en) * | 2005-11-22 | 2006-12-19 | General Electric Company | Method, system and module for monitoring a power generating system |
| JP2008020390A (en) * | 2006-07-14 | 2008-01-31 | Shinka Jitsugyo Kk | Method, equipment and system for testing optical property of optical fiber device |
| CN101165516A (en) * | 2006-10-17 | 2008-04-23 | 深圳朗光科技有限公司 | Optical fibre coupler and its optical fibre end processing method |
| CN101592549A (en) * | 2008-05-28 | 2009-12-02 | 中国计量科学研究院 | Polarization dependent loss standard apparatus |
| CN101694413B (en) * | 2009-11-02 | 2011-06-08 | 中国电子科技集团公司第四十一研究所 | Optical echo loss calibration transferring part |
| CN102135468A (en) * | 2010-01-26 | 2011-07-27 | 上海光家仪器仪表有限公司 | Optical insertion and return loss tester |
| CN201955521U (en) * | 2011-03-01 | 2011-08-31 | 武汉昱升光器件有限公司 | Low reflection pigtail |
| US9360392B2 (en) * | 2013-06-28 | 2016-06-07 | Corning Cable Systems Llc | Calibration of optical time domain reflectometry optical loss measurement in optical fibers having potentially dissimilar light backscattering efficiencies |
| CN105444990B (en) * | 2015-11-04 | 2018-01-02 | 中国电子科技集团公司第四十一研究所 | A kind of dynamic corrections device and method of test light insertion loss and Optical Return Loss |
| CN109004973B (en) * | 2018-07-04 | 2021-09-07 | 广州广电计量检测股份有限公司 | OTDR performance evaluation device and method |
| CN109039442B (en) * | 2018-08-21 | 2024-01-30 | 中国信息通信研究院 | Calibrating device and calibrating method for optical return loss |
-
2019
- 2019-10-30 CN CN201911045195.0A patent/CN110686867B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110686867A (en) | 2020-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4979793A (en) | Optical simulator with loop-back attenuator and adjustable plunger mechanism | |
| US4982083A (en) | Optical simulator with loop-back attenuator and filter | |
| US4952798A (en) | Optical simulator with loop-back attenuator and optical thin film | |
| US4257671A (en) | Fixed optical attenuator for light rays guided by optical fibres | |
| US9360392B2 (en) | Calibration of optical time domain reflectometry optical loss measurement in optical fibers having potentially dissimilar light backscattering efficiencies | |
| CN107588930B (en) | Novel communication optical fiber macrobend loss testing device and testing method | |
| CN105444990A (en) | Dynamic correction apparatus and method for testing optical insertion loss and optical return loss | |
| CA2369006A1 (en) | Apparatus for measuring the properties of an optical fiber | |
| CN107588924B (en) | communication optical fiber macrobend loss testing device and testing method | |
| US4552454A (en) | System and method for detecting a plurality of targets | |
| CN110686867B (en) | Optical return loss calibration transfer device and method | |
| CN108956092B (en) | Polarization coupling distribution calibrator and method based on integrated Y waveguide structure | |
| WO2020169964A1 (en) | Method for testing quality of optical network components | |
| US9482823B1 (en) | Fiber attenuator based on MPO loopback assembly having angled ferrules | |
| CN113670578B (en) | Optical performance test line and optical test device for multi-core optical fiber array connector | |
| CN107449588B (en) | Communication optical fiber macrobend loss test method | |
| US10969302B1 (en) | Optical time-domain reflectometers and related methods | |
| CN115628885A (en) | Calibration system for multimode optical fiber return loss measuring equipment | |
| JP2810318B2 (en) | Optical connector optical characteristic measuring receptacle and optical characteristic measuring method | |
| US20240072889A1 (en) | Methods and apparatus for implementing a fiber optic reflectance standard | |
| CN114257300B (en) | Method and device for testing running state of Optical Network Unit (ONU) equipment | |
| US20210255058A1 (en) | Devices and methods of testing optical systems | |
| CN112198591B (en) | Fresnel noise suppression unit at tail end of optical fiber and manufacturing method thereof | |
| Kamimura et al. | Return Loss Measurement Procedure for Multicore Fiber Connectors | |
| CN107453805A (en) | A kind of removing method and device of the interference of optical time domain reflectometer ghost |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |